SOURCE

function towSum(nums, target) {
	let i = 0;
	let j = nums.length - 1;
	while (i <= j) {
		if (nums[i] + nums[j] == target) {
			let ans = "[" + i + "," + j + "]";
            //var temp = [i];
            //temp.push(j);
            //return temp;
			return ans;
		}
		else if (nums[i] + nums[j] < target) i++;
		else if (nums[i] + nums[j] > target) j--;
	}
	return -1;
}

const nums = [1, 2, 3, 4, 5, 6];
const target = 11;
console.log(towSum(nums, target));